It all depends on the buyer. If I see one more house covered from top to bottom in grey and white I might scream. They feel cold and boring to me. I'd rather see personality--even if I don't like the style for myself.
I hate trendiness. For example, I actually love the color gray, but the overuse of it right now makes me want to avoid it for awhile.

I also hate things that everyone loves today and they'll all hate 2 years from now...barn doors, anyone?

(Ugh, we stayed at a hotel with a barn door style door on the actual bathroom--like where the toilet and shower/tub were located. What a disaster! And it was a new hotel. The lock was so difficult because the door moved around too much, there was no muffling of sound at all, and when you were in the bathroom it was like being in a public restroom stall with big gaps of light on both sides. My 8 year old was having a fit about it.)
Anyway, also, if you have really solid, well-made features in your house, I think it's particularly tragic if you remove any of them to put in something new and trendy that likely isn't made as well, because a few years from now it will be so outdated that people are just going to rip it out anyway. Like taking out hardwood floors for those plank looking faux wood floors. Hardwood floors can be refinished, fixed, re-stained, to last over a century if properly cared for. Those faux wood floors can only be replaced in damaged or if you grow weary of the look of fake grey stained wood.
But I know that I am probably in the minority and most people want to walk in and say "Oh!! It looks like Chip & Joanna designed it!! Yay!!". So if you can inexpensively toss in some of that look, I can see a realtor suggesting it. (Ugh.

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